Nut-lock.



PATBNTED SEPT. 11, 1906.

I W. HJHARLOW.

NUT LOCK. APPLICATION FILED APE.17,1906.

orrron.

"Spefcification of Letters'Patent.

I Patented Sept. 1 1, 1906.

Applitation filed April 17,1906. Serial 15312 .279.

To all whom it may concern:

Be it known that 1, WILLIAM H. HARLOW, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Nut or Bolt Locks; and I do hereby declare the following to be a 'full, clear, and-exact description of the invention, such as'will enable others skilled in the art to'which it appertains to make and use the same, reference'beinghad to the accompanying drawings, and to the letters of reference marked thereon, which: form .a part of this specification. i

This invention relates to new and useful improvements in nut and bolt locks, and the ob ect of the invention is to produce a bolt having a detachable section which is provided with one inclined faceand the convexed portion having series of segment threads, said section being adapted to rock to My invention comprises various other de-" tails of construction and'combinations and arrangements of parts,which willbe hereinafter fully described and then specifically defined in the appended claims.

f I illustrate my invention in the accompanying drawings, in which Figure 1 is a view showing the nut screwed upon the bolt and held in a locked relation; Fi 2 is a side elevation of the bolt with the 'loc ng-piece removed. Fig. 3 is an edge Fig. 4 is an edge view of having a head A and a shank portion which is threaded. Said shank portion has a cutaway part B, the surface of which has two view showing one of the angled suI'- faces of the bolt.

angled faces (designated by letters 0 and D,

respectively) and a projecting portion E at the end forming a shoulder.

F designates a nut of the usual construction v having threads adapted to receive the threads of the bolt.

H designates a locking-plate which has an inclined surface K, as shown clearly in the sectional view of the drawings, and is adapted to rest in the'recessed portion of the bolt and adapted vto rock upon the inclined surfaces thereof. Said locking plate has a notch N formed in one end thereof and adapted to receive the part E, which is integral with the bolt and designed to limit the movement of said plate in one direction.

It will be noted by reference to Fig. 8 of the drawings that there is a slight wedge-shaped space 0 intermediate one of the inclined surfaces in the recessed portion of the bolt and the adjacent edge of the locking-plate, and in which a wedge-shaped object R may be inserted for the purpose of preventing the plate from rocking when it is desired to unscrew the nut.

In applying the nut-the shoulder of the locking-plate coming'in contact with the projecting part E will cause the threads upon the bolt and the locking-plate to be in registration; but in the event of it'being desired to loosen the nut if the wedge-shaped strip is withdrawn from the similar-shaped space 0 said locking-plate will be caused to rock and the segment-threads thereon will bear against the threads of the nut with suflicient frictionalforce to prevent the nut from being recessed end, a locking-plate having a recess in one endand provided with a con- -vexed threaded surface, a portion of said plate having faces at angles to each other adapted to seat upon the recess in the bolt, means for holding. the plate from rocking, an integral portion E on the bolt designed to receive the recessed portion of said plate and I0 5 adaptedto hold said latter upon the bolt.

2. A nut-look comprising a bolt having a in the edge thereof, adapted to receive said 10 recessed end, a lockinglate provided with a integral portion E upon the bolt, asset forth. conveXed threaded sur ace, a portion of said In testimony whereof I have hereunto atplate having faces, at angles to each other fixed my signature in the presence of two adapted to seat upon the recess in the bolt, Witnesses.

means for holding the plate from rocking, an WILLIAM H. HARLOW.

v integral portion E of the nut rising from the Witnesses:

surface, said locking-plate having a recess CHARLES W. HOGAN.

bottom of said recess and having threaded WILLIAM A. MILLER, 

